Window-lock.



E. P. DAVIS.

WINDOW LOCK.

APPLICATION man JULY 14. 19..

Elma/Mom Patented Mar. 21, 1916.

THE COLUMBIA PLANOGRAPH (0., WASHINGTON, u. a.

UNITED STATES PATENT QFFIfiE.

EDWIN POWELL DAVIS, OF BRIDGEPORT, CONNECTICUT.

WINDOW-LOCK.

Application filed July 14, 1915.

To all whom it may concern Be it known that I, EDWIN POWELL DAVIS, a citizen of the United States, residing at Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in lVindow- Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to window-locks and is an improvement upon the invention in my Patent N 0. 1,114,867 granted October 27, 191%. Its object is to provide a lock which will permit the parts of a window to be secured when either section of the window is adjusted for ventilating or other purposes. I have also provided improvements by which it is made practically impossible to surreptitiously remove the lock casing or operate the lock.

To this end it comprises the combination of details set forth in the appended claims.

In the drawings Figure 1 is a partial view in elevation of the sashes of a window and the frame showing the relative location of the parts of the lock; Fig. 2 is a longitudinal section of the parts of the lock in engage merit; Fig. 3 is a transverse section showing the base-plate and the rear plate of the casing about to be connected to the base-plate; Fig. 4 is an elevation partly in section showing the lock-lever in place; Fig. 5 is a detail perspective showing the lock-lever without the projecting finger piece; Fig. 6 is a detail perspective showing the catch which is secured to the rail of the lower sash in the illustrated application.

Reference numeral 11 indicates the lower sash and 12 the upper sash. As indicated in Fig. 1, one part of the lock, preferably the catch is secured to the upper rail of the lower sash while the body of the lock is secured at some determined position to the side of one of the stiles of the upper window sash, so that when the lower sash is raised the catch will engage its lock and when the upper sash is lowered the parts of the lock will likewise engage.

In the form which I have illustrated 13 represents a casing, preferably of metal, with a front wall 14 to which is secured a forwardly extending trough-like portion Specification of Letters Patent.

Patented Mar. 21, 1 916.

Serial No. 39,875.

140. In this illustration of my invention the front wall is an annulus lying within the casing and having a struck-up pro ection or prong which takes into the corresponding opening in the upper wall or the casing 11116 the lower pait of the annulus has a flange with an opening WlllCll receives an up-turned prong of the lower wail of the casing.

inrough the face of the casing 13 and substantially through its center passes a bolt or post 15 having one end reduced so that a shoulder lo is Iol'llled. between the taco of the casing and the shoulder 16 is placed a spring ll. '1he bottom of the post 15 passes through a base-piate 18 which is secured to the stile of the windowsash, a struck-up opening 19 being provided for this purpose.

'1'he base-plate 18 has a body substantially circular in Iorhi with two opposite wings or sectors 20 and 21 each of which is similarly grooved, as indicated at 22, to engage a no 25 on the parts now to be described. I, preferably, construct the casing as illustrated, that is, with a hood substantially horse-shoe shaped in cross section and carrying at the rear a part having its face 26 cut away at 27 to conform to the base-plate 1b, and a flange 28 bent from the top wall of the casing and lying behind the rear wall of the casing.

The edges of the part 26 engage beneath the wings :40 and 21 which are siightly elevated from the rail of the window sash. The object is to place the bottom of the post 15 in the opening 19 with the body of the lock turned at substantially right angles to the rail and then to turn the body of the lock so that the opposite sides of the part 26 will engage beneath the wings 20 and 21, the ribs 22 finally shaping into place in the grooves 23 on the face 26 so that the lock body or casing shall be centrally positioned upon the stile.

29 represents a lock-lever comprising a plate which, in the illustrated form, is substantially rectangular and which is perforated at 30 to take over the post 15. The lock-lever 29 lies between the shoulder 16 and the spring 17, the spring holding it in place and yielding against pressure while the shoulder 16 prevents the lock-lever from being pressed back too far by the spring 17.

The top of the lock-lever 29 is provided with a projection or a series of projections 31 to pass through a perforation or perforations 32 in the top wall of the casing so that the lock-lever is fulcrumed in the top wall of the casing. In this application 33 is a separate finger piece for operating the lock-lever. The end of the lock-lever reaches through a perforation 141 in the front wall 14 of the casing. The sides of the perforation 141 guard the end of the lock-lever from sidewise movement should any attempt be made to remove the casing without first pulling and holding the fingerpiece. The finger-piece of the lock-lever has a cut with one side beveled away or in clined, as shown at 230, and an extending lip 231, so that the engaging end of the finger piece may be fitted into place in the perforation in the lock-lever and serve todraw the lock-lever forward to release it from the catch to be described.

34 represents a catch-plate which, in this illustration is formed with three teeth. The upper tooth 35 projects slightly above the horizontal plane of the two lower side teeth 36 so that as it comes into engagement with the lock-lever it will ride along the under side of the lock-lever 29 and finally snap into engagement in the perforation 37 in the plate part of the lock-lever. The two side teeth of the plate 34 rest against the face of the plate part of the lock-lever preventing a downward movement.

At 190 and 191 I have illustrated prongs or looking arms which extend from the rear of the lockinglever 29 and engage each side of wing 21 of the base-plate 18 or enter perforations in same. When the lock-lever is drawn forward the prongs will be removed from the sides of the base-plate permitting the casing to be removed from the base-plate. At other times these arms or prongs serve as a guard to prevent a surreptitious removal of the casing from the base-plate.

As in the form of my preceding application so in the use of this window lock the body of the lock containing the lock-lever may be placed at any desired point on the upper window sash. Generally this polnt should be chosen so that neither sash can be brought to a position which would enable a person to enter the room through the opening. For example, if in a position as illustrated in Fig. 1 when the lower sash is lifted the catch will engage the lock on the upper window-sash and hold the lower window elevated to the desired position. Or the upper window sash may be brought down until the lock engages the catch on the lower window-sash. Even if some one from outside were to pull the locklever 29 and disengage the catch and the lock, the lower window, for example, could not be pushed apart. within the room, the lock may be readily raised nor the upper window lowered because to do so would simply bring the parts of the look again into engagement. It is, therefore apparent that this lock permits both parts of a window to be locked together when open at the top or bottom or when open at both top and bottom. Ordinarily also it will prevent the windows from being 011 the other hand, by one removed by simply pulling and holding the finger piece then turning it upon its axis and lifting it off to permit the window to be ad usted to any. desired position. To enable this ready adjustment it is obvious that the base-plate 18 may be duplicated or mul tiplied at various points so that the lock may be adapted to any desired separation of the windows.

I procure also the advantages described in my preceding application. For example, I may make the lock of metal and conceal all screws to render the felonious removal more difficult. I provide for economy and simplicity in manufacture and operation. I provide also that the upper sash may not be lowered beyond a predetermined position and, conversely, the lower sash cannot be raised beyond a predetermined point. In this case, as before, the base-plate being substantially flat and thin does not interfere with the raising or lowering of the sash so that a series may intervene between the upper one and the rail of the opposite sash. In the special construction, however, I make further provisions against the unwarranted manipulation of the window-lock or its removal from outside the window. The finger piece of the locking lever is so nicely ad- ]usted to the locking lever that it can be operated from a natural direction from in front by drawing forward but is practically incapable of operation from outside because when it is lifted it does not operate and is, in fact, removed from the locking lever. I also have connected the locking lever and the back wall or base-plate so that the looking lever must be drawn forward to permit the removal of the casing. This arrangement makes it practically impossible to remove the casing without the use of both hands, a task which would be exceedingly difficult if not impossible from without the window or through an ordinary narrow space left for ventilation. To further safeguard the felonious disengaging of the locking parts the finger piece can be removed. It will be observed that I have in the arms or prongs 190, 191, 192 and the curved lower end of lock-lever 29 a double guard against the sidewise twisting of the casing or any unwarranted attempt to remove it. In short, while maintaining all of the advantages of my previous form I have added to that form the additional protection of the separate operating finger-piece and the looking arms or prongs to prevent the easy removal of the casing.

I claim 1. In a window lock the combination of a vertical casing, a spring lock lever within the casing having a perforation at one end, and an operating finger piece cut at one end to fit within the perforation of the locking lever and extending substantially horizontally and adapted to be operated when drawn downwardly or outwardly.

2. In a window look, a vertical casing, a spring lock lever within the casing having a perforation, a free operating finger piece extending horizontally and adapted to engage the locking lever through the perforation and operative when drawn downwardly or outwardly but inoperative when lifted.

3. A window-lock comprising a base-plate and a casing and a locking-lever within the casing, the locking-lever having projecting arms or prongs which normally engage the base-plate, and means for operating the locking-lever.

4. In a window-lock, the combination of removable casing, a locking-lever, means for operating the locking-lever and means for locking the casing in place operated by the locking-lever.

5. In a window-lock, the combination of a casing, a locking-lever perforated at one end, and a finger-piece having one end passing through the perforation to engage and operate the locking-lever, the locking-lever passing through a perforation in the wall of the casing and thus preventing sidewise movement of the casing.

In testimony whereof I have hereunto signed my name.

EDIVIN POIVELL DAVIS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

